Grinding-machine.



Patnted lune I9, |900.

E. RIVETT.

GRINDING MACHINE.

(Application filed Dec, 22, 1899.

(No Model.)

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UNITED STATES.,

`EDwARDaiYEELQEQsT/QNFMASISAQEUSETTs.

PATENT OFFICE.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 652,007, dated June 19, 190.0. Application filed December 22, 1899. Serial No. 741,238. (No model.)

To all whom t may concer-.17,.-

Be it known that I, EDWARD RIvETr, a citizen of the United States, residing at Boston, in the county of Suolk and State of Massachusetts, have invented an Improvement in Grinding-Machines,of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention has for its object the production of a novel grinding-machine having provision to overcome end shake or thrust of the spindle and also to insure the proper tit of the spindle in its bearing or surrounding box and to provide for lubrication of the same. Figure 1 of the drawings represents inV elevation a spindle contained in a box or sleeve embodying my invention, the said box or sleeve being in longitudinal section, together with the pulleys and detachable ends for carrying the grinding-tool, Fig. 2 represents in sectional detail the holder and one adjusting device for thebearing-section, the holder be-V ing in its extreme position to the left viewing Fig. 1. Fig. 3 represents the bearingholder detached and in elevation. Fig. 4. is a cross-section of Fig. 3 in the dotted line at. Fig. 5 represents detached the contractile bearing-section which contacts with the spindle. Fig. 6 is an end view of Fig. 5. Fig. 7 shows one of the wedges detached. Fig. 8 is an end View thereof. Fig. 9 shows an end view of the quill and sleeve within it. Fig. 10 shows the holder and bearing-section in its contracted position. Fig. 11 shows the washer 5 detached.

Referring to Fig. 1, it showing oneof my improved spindles and external bearing in one of the best forms now known to me, the dotted line A represents a suitable head, in which is located a quill a, said quill being held in said head in any usual manner, so that it may be readily withdrawn whenever desired. Thequillhasinteriorscrew-threads a' at each end.

The spindle B, which may be that of a grinding-machine, lathe, or any other shaft or journal which it is desired to rotate kat a high speed and obviate any injurious'eects due to end shake or thrust, has,as represented,substantially midway its ends a fixed collar B', and said spindle has,as herein represented, two like shoulders 2, which receive against them the end of a sui table pulley B2, so that said spindle may be driven positively by two belts, one on each of said pulleys, one belt being crossed so that both belts may so apply their power as to drive the spindle in the same direction.

The extremities of the spindle B are repre sented as threaded, as at Ba B4, to receive, respectively, suitableA tool-carriers B5 B6, said tool-carriers being represented as dierently constructed as to length or size in order that any desired tool may be put upon said carriersf-as, for instance, one carrier may be longer than the other to thus provide for grinding holes ofk varying depths-and said screw-threads are made theone a right-hand and the other a left-hand thread for the reason that at times the interior or exterior of the edge of the grinding-tool must contact with the work, and by the use of two wheels applied to the spindles by screw-threads of dierent hand it is possible to use the tool at `either end of the spindle, according to the Work to be done, and when desired the quill, as stated, may be readily detached` from the head and turned the other end to, according 8o v to whichtool it is desired to use.

, I apply at each side of the collar B' a suitable antifriction-washer, as 3X, composed,

preferably, of vulcanite ibelyand thereafter 'I insert in each end of the quill a sleeve c,

having, as represented, at one end a head c', provided with a hole to surround the spindle, said sleeve being threaded externally near its head end to enter threads a ofthe quill, -a suitable'set-screw, as 0,2, holding the sleeve in the position which it is desired it shall occupy when the spindle is running, said sleeve being made adjustable by said screw-thread longitudinally in or with relation to the quill to compensate for any Wear in the parts. The inner open end of each sleeve is milled to provide a shoulder 4. and form a counterbore to receive a washer 5, preferably of met-al and preferably'provided.with a series of holes, (see Fig. 11,) said holes serving to retain oil. Before, however, applyingthe sleeves to the spindle I place inside each sleeve a holder d, cylindrical externally and having made IOO through it centrally an opening toreceive a bearing-section or colnpressible box d', (shown separately in Fig. 5,) said box contacting at its interior directly with the shaft, the boxV The wedges e are of a length to atone end substantially touch the inner sides of the 'Washers 5, located in the countersinksat the being provided With slits 6 7, cut intronit from. itsw'opposite ends, said( slits extending int@y the box for a distance far enough to enableu the inner ends of the slits cut/ipvtg Qneendscf` into the other end of the box, so that said box 1o so slitted has a capacity when subjected to pressure lof collapsing or contracting externally that it may be maintained substantially closely or with a running fit against the spindle. The box is' represented as provided with a series of holes which arelled with a mateiial-rsuch, for instance, as described in United States Patent No. 608,916, dated Au-v gust 9, 1S98-capable of receiving anddelivering up oil slowly to the spindle, as required. The holder dis also provided with a plurality of longitudinal grooves, herein represented as 3, each groove receiving a tapered key or adjusting device e, (shown detached in Fig.A 7,) the tapered backs of said keys contacting with the holder, while the straight faces of the keys contact with the exterior of the box. The headend of each sleeve is 'provided with a stud-screw e', having av collar e2 (see Fig. l) and ahead e3, adapted to be engaged by a suitable key or wrench. The threaded end Vof said screwA enters a threaded hole in the end of the holder, the outer end e3 of said screw passes through a hole made in the end of the sleeve, and the collar of said screw bears against the inner side of the head of the sleeve, so that by rotating said screw the holder maybe slid longitudinally or drawn outwardly. toward the en ds of the spindle, while the large ends of the wedges rest against 4o the'inner sides ofthe heads of the sleeve, such movement of the holdercausing the stationary wedges to clamp more rmlythe bearing d', At-his adjustment being made when for any reason it is desired to take up or provide-for Wear of the parts. After this adjustment of the holder shall have been made the holder may be secured in its adjusted position by, means of suitable set-screws, as f, entering holes f', t-he heads of said screws contacting with the outer side of the heads of the sleeves, the threaded parts of the screws entering threaded holes in the outer ends of the holders. The pulleys B2 and the carriers B5 B6 may beapplied to the spindle after the spindle with the partsdescribed have been inserted in the quill and the quill put into working position in the head.

From the foregoing description it Will be understood that the washers 5, connected with the ends of the sleeve, may in practice always bear uniformly against the antifriction-washers 3, backed up by the collar B', carried by the spindle, and lthe collar acted upon at each face by such washers is pre-b vented fr qm end shake or thrust in the quill, andcons'eq-uently accuracy of grinding may be pigjvided for.

Y,endsof the sleeves, while their outer ends contact with the inner sides of the heads of the sleeves, and said wedges in .operation do mlvlwe/atallg/buthey are made effective in tightening up the bearing olf' by moving the holder, and D116. .holder is provided with 'means whereby it may be retained in exactly fits proper adjusted position, and in this adjustment of the holder its inner end may retire from contact with the Washer 5; but the adjustment of the holder may be made Without adjusting the sleeve; but if for any reason the washer should wear the screw a2 may be; loosened and the sleeve turned to insure t-he proper working fit between the Washers 5 and 3. f

The bearing will preferably be composed of brass or of a metal differing from that of the spindle.

By providing the spindle with a plurality its own driving-belt, the spindle may berotated'from'a plurality of sources at the same speed, and by driving the spindle at opposite endsl of the quill a steadier motion is obtained, and the carriers connected with the spindle may be provided with any suitable emery or otherwheels or tools to be used. The tapered wedges or keys constitute adjusting devices for the bearing, and any tendency to end shake or thrust may be taken up or compensated for by adjusting the sleeves Within the quill. f f

The bearing or bearing-section d is provided (see Fig. `5) with 4a, keyway 8, which receives a pin or projection extended from the inn r face ot'v one of the tapered Wedges or adjusting devices, said key 'and projection preventing any possibility of the rotation of Vthe bearing-section in the holder; c The screws'e' and f prevent anyrrotation of the holder in the sleeves fixed inthe quill.

c Oil applied` to the hub maybe in closed therein air-tight and will last for a long period of time.

It will be seen from the drawings that the holder is cut outcentrally, as at 14, and presents inturned portions at its ends, said holder being bored f to receive the slitted bearingsection, the exterior of which when first applied to the holder being of such diameter as to be inserted easily t-hrough the bore of the holder, and practically it is best that the exterior of the bearing-section does not contact with the holder. It is, however, necessary thatt-he straight faces of the wedges contact with the exterior of the slitted bearing-section, and by a relative change` ofV posi-tion of thev holder and Wedges it will be obviousthat .the wedges will be moved uniformly toward the center of rotation of the spindle and in such movement will so 'compress the bearling-section as to contract its `inner diameter ,to fit the spindle.

of sheaves or driving-pulleys, each to receive IOO IOS

IIO

, Figs. l, 3, and 4 show the holder at the lefthand end of the quill, supposed-ly in its original position, and the bearing-section of full diameter; but Figs.' 2 and 10 shovv the holder adjusted to contract the bearing.

Each carrier B5 and B6 is shownas provided at its end with a threaded holeiand. these holes will receive suitable set-screws to attach to the carrier in Working position '.einery- Wheels or other tools to be used.

If the spindle is rotating in Whatis called a right-hand direction and thev toolV is to grind the inner side of a bore, then tolmaintain the tool-carrier ixedly upon the spindle the thread joiningthe carrier with:the'spindle-must be a right-hand; but under thesa'me conditions `should the grinding-tool beufsed to grind the exterior of a-cylinderthenj'ithe carrier, owing tothe friction exerted, bythe tool upon the thing being ground, Wouldbfe unscrewed from the spindle.,y Hence Witha right-hand rotating spindle to grind an arti= cle externally the thread uniting the carrier to the spindle must be a left-hand thread, tlife"` object being in all conditions toenable the strain exerted upon the periphery of thetool in use to be applied to the carrier in such a direction as Would tend to turn or screw the carrier farther upon the end of the spindle to which it is attached.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In an apparatus of the class described, a spindle having a collar, a surrounding quill having at its opposite ends sleeves, containing each a Washer, said Washers coperating with the opposite sides of said-collar to prevent end shake of the spindle.

2. In an apparatus of the class described, a spindle having a collar, a surrounding quill having at its opposite ends a sleeve containing each a washer having a series of perforations to carry oil, said washers coperating with the opposite sides of said collar to prevent end shake of the spindle.

3. In an apparatus of the class described, a spindle having a collar, an antifriction-washer applied to said spindle at each side of said collar, a surrounding quill having at its opposite ends sleeves containing each a Washer, the Washers of the sleeves contacting with said antifriction-washers.

4E. In an apparatus of the class described, a spindle having a collar, a surrounding quill having at its opposite ends adj ustablesleeves containing each a Washer, said Washers cooperating With the opposite sides of said collar to prevent end shake of the spindle.

5. In an apparatus of the class described, a spindle having a collar, antitriction-Washers applied to said spindle at each side of said Washer, a surrounding quill having at its opposite ends adjustable sleeves, and containing each a washer at its inner end, the Washers of the sleeves contacting with the antifriction-Washers resting against the outer sides of the collar.

6. A cylindrical bearing-section having a series of slits cut in the same from its opposite ends,`said slits extending one beyond the other, a holder in which said bearing-section is fitted, and a series of Wedges mounted loosely in said holder, means to adjustthe holder longitudinally with relation to said bearing-section and longitudinally of the wedges, causing said Wedges to be movedv toward the longitudinal center of said bearing-section to contract the diameter about and compensate for Wear.

7, A cylindrical bearing-section having a series of slits cut into the'same from its opposite ends, said slits extending one beyond then othexgsaid section being provided with a seriesof holes and non-metallic material plugging said holes, and a holder for said bearingsection, and adjusting means cooperating with the exterior 'of the bearing-section to contract the diameter of the opening in the bearing to compensate for Wear.

8. In an apparatus of the class described, ,a spindle, a'surrounding quill having applied Within its end a sleeve, a holder contained fwithin said sleeve, a series of Wedges also eguided in said holder, a'slitted bearing-section also contained Within said holder, the exterior of said section contacting with one side of said Wedges, and means to adjust said holder in or With relation to the sleeve and also with relation to the Wedges whereby the latter may act to decrease the inner Working diameter of the bearing-section to compensate for Wear.

9. A revolving spindle having a collar, a quill surrounding said spindle and having applied adj ustably in its opposite ends a sleeve, each sleeve having at its inner end a Washer cooperating with a collar, a series of Wedges located Within each of said sleeves, a holder also located Within each of said sleeves and guiding said Wedges, slitted bearing-sections contained Within said holders and provided with a series of slits extended inwardly from its opposite ends, said bearing-sectionbeing acted upon externally by said wedges, means to adj ust said holders Within said sleeves to effect the movement of the Wedges toward the center of rotation of the spindle, the sleeves and the Washers at their ends remaining in their operative position While the holder is adjusted 'to eect the decrease of the inner diameter of the bearing-section.

10; In an apparatus of the class described, a quill having applied 'to it a sleeve havinga head at one end, a Washer. located in the opposite end of said sleeve, a holder contained in said sleeve and provided with a series of Wedges,a slitted bearing-section applied Within said holder loosely, a series of wedges also carried by said holder and contactingY with the exterior of said slitted bearing-section, said section 'and one of said wedges being united by or through asuitable projection to IIO prevent the rotation of the slitted section in the holder.

11. In an apparatus of the class described,

a quill, sleeves secured in the opposite ends said sleeves, a series of wedges guided by. said holder, a slitted bearing carried by each of said. holders, a screw vcarried by said holder ,and having its head exposed atthe end of the sleeve, the rotation of said screw effecting the longitudinal movement of the holder toward the closed end'of the sleeve sliding theholderv over the said wed ges and thereby causing the acting faces of the wedges in contact with the slitted bearing-section to effect a decrease in the diameter of the inner surface of said bear'- ing-section. i

12. In an apparatus of the class described,

' a quill, sleeves secured in the opposite ends of said quill, a holder'locatedwithin each of said sleeves, a series of wedges guided by said holder, a slit-ted bearing carried by each of said'holders, a screw carried by said holder and having its head exposed at the end of the sleeve, the rotation of said screw eecting the longitudinalmovement of the A,holder toward the closed end of the sleeve, sliding the holder over the said wedges and thereby causing the acting faces of the wedges to contact with the slitted bearing-section to eifect a decrease in the diameter of the inner surface of said bearing-section, and suitable means to lock the vsleeve and holder in theiradj usted position. of said qui11a holder located within each of r 13. In anlapparatus of the class described, aspindle, means to sustain said spindle in its Vrotation and 'prevent' end shake thereof, said spindle having threaded portions at its opposite ends of reverse hand, whereby a tool-carrier may be applied t-o both the right and left hand threaded end .and enable the spindle in its rotation, and revolving Athe tool, to obviate loosening the'vtool-carrier with relation to the spindle.

14. In a machine o f they class described, a quill containingv an adjustable bearing, and provided atone extremity withy a right and at its opposite extremity with a left hand thread, each end of the spindle havinga shoulder, combined with two belt-pulleys applied to said spindle, and tool-carriers applied to the threaded ends of the spindle.

In testimony whereof I have signed my name tov this specification in the presence of two subscribing witnesses.

' EDWARD RIVETT.

Witnesses:

' GEO. W. GREGORY,

MARGARET A. DUNN. 

